Data Communication; I Functions For Afsk; I Connections For Afsk - Icom IC-910H Instruction Manual

9

DATA COMMUNICATION

I Functions for AFSK

The IC-910H does not have an FSK mode for RTTY,
AMTOR, PACKET, etc., however, you can operate
these using AFSK in SSB or FM mode.
The transceiver accepts data speed of up to 9600 bps.
When using 9600 bps, set the transceiver to the 9600
bps data mode using the general set mode. (p. 57)
When operating AFSK, connect external equipment to
the DATA (MAIN or SUB) or ACC socket on the rear
panel, or to the microphone connector on the front
panel as in the diagram below.

I Connections for AFSK

◊ Connections via [DATA] socket
Use FM mode for 9600 bps operation.
Use SSB or FM mode for 1200 bps operation.
•9600 bps connection
Shielding cable
q DATA IN
w GND
e PTT r DATA OUT
y SQ*
[DATA] socket
(Rear panel view)
◊ Connections via [ACC(1)] socket or [MIC] connector
Use FM mode for 9600 bps operation.
Use SSB or FM mode for 1200 bps operation.
•Connection via [ACC(1)] connector
(Rear panel
view)
•Connection via [MIC] connector
(Front panel
view)
52
TNC
TX AUDIO
GND
RX AUDIO
PTT
SQL*
* Connect the SQL line when required.
A
B
2
C
4
5
D
3
1
8
6 7
E
F
*
A
C
B
1
7
E
2 8 6
D
3 5
4
F
*
From The N3UJJ.COM Document Library From The N3UJJ.COM Document Library
OPERATION NOTES FOR 9600 bps
• Set the transceiver to 9600 bps data mode.
- See p. 57.
• Set AFSK/GMSK output level of the terminal unit to
0.4 V p-p (0.2 V rms).
- When exceeding 0.5 V p-p (0.25 V rms), the trans-
ceiver's modulation limiter stops modulation.
- At this time, the [RX/TX] indicator's brightness fades.
• AF output from the transceiver is continuous and is
not cut by the squelch circuit.
•1200 bps connection
Shielding cable
q DATA IN
w GND
e PTT
y SQ*
t AF OUT
[DATA] socket
(Rear panel view)
* Connect the SQL line when required.
A
AFSK output
B
C
AF input
D
PTT
E
GND
F
Squelch input
* Connect the SQL line when required.
TNC
TX AUDIO
GND
RX AUDIO
PTT
SQL*
TNC
TX AUDIO
GND
RX AUDIO
(1200 bps)
PTT
GND
SQL*